Building off the concept that
Tim Sneath published on creating video with overlays, I thought I'd demonstrate handling timed overlays using the media markers of a video file.
In this screencast, we look at
Expression Media Encoder and
Expression Blend 2 Preview together, demonstrating encoding a file with media markers and then using
Silverlight to monitor when those markers are triggered, then perform some animation.
This technique can be useful when re-using media elements across advertising for example, but displaying different messaging, promotional offers, links, languages, or whatever.